Absolutely I have an answer 
From the post linked below…
There are a variety of reasons why one might choose to use a magickal name. Maybe they are afraid of getting caught and “outed”. Maybe they simply like the anonymity it provides. Maybe it means something to them. Or maybe, like Lady Althaea , their magickal name is chosen for them by their Gods.
The magickal name can become part of your identity and, when used, is like donning your robes for a ceremony or ritual. It becomes who you are at that moment, and it is a reminder to yourself and those around you that this is a time separated from the mundane.